add device/suggested_area to message discovery of zigbee2mqtt. the friendlyname of zigbee2mqtt message is <suggested_area>--friendlyname ex: friendlyname = 'salle--lumiere_chambre_d_ami this device.suggested_area = salle
In Home assistant it's directly add to "Salle"
Change in zigbee2mqtt, topic to homeassistant by homeassist zigbeeaddarea write on topic homeassistant